Set-top box



FIG. 1 is a perspective plan view of the set-top box of our new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a back plan view thereof;

FIG. 4 is a side plan view of one side thereof;

FIG. 5 is a side plan view of the second side thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a set-top box, as shown and described. 